These are gears used on shafts whose axes are parallel to each other. They also have evolvent profiles and work by rotating in contact with each other in this evolvent profile. Spur gears are used to transfer motion from one shaft to another. Along with motion transfer, they also have the ability to reduce and increase the speed at the desired rate. Spur gears are used in machines in many sectors. Spur gears are diversified according to their intended use.